11.2.2 Motorola 680x0 specic

Using the -O2 (the default) switch does several optimizations in the code produced, the most notable being:

• Sign extension from byte to long will use EXTB
• Returning of functions will use RTD
• Range checking will generate no run-time calls
• Multiplication will use the long MULS instruction, no runtime library call will be generated
• Division will use the long DIVS instruction, no runtime library call will be generated